body {
    font-family: Arial, sans-serif;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
    line-height: 1.6;
}
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1em 2em;
    background: #fff;
    border-bottom: 1px solid #eee;
}
.nav-links {
    list-style: none;
    display: flex;
    gap: 1em;
}
.nav-links a {
    text-decoration: none;
    color: #333;
}
.hero {
    text-align: center;
    padding: 4em 2em;
    background: #f5f5f5;
}
.btn-primary {
    display: inline-block;
    padding: 0.6em 1.2em;
    background: #2563eb;
    color: #fff;
    border-radius: 6px;
    text-decoration: none;
}
footer {
    text-align: center;
    padding: 1em;
    background: #fafafa;
    border-top: 1px solid #eee;
    margin-top: 2em;
}
body {
    font-family: Arial, sans-serif;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
    line-height: 1.6;
}
.feature {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 60px 0;
}
.feature:nth-child(even) {
    flex-direction: row-reverse; /* 偶数项反转，图文交替 */
}
.feature img {
    width: 70%;
    max-width: 400px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.feature-text {
    width: 45%;
    padding: 0 20px;
}
.feature-text h2 {
    margin-top: 0;
    color: #333;
}
.feature-text p {
    color: #555;
}
@media (max-width: 768px) {
    .feature {
        flex-direction: column;
        text-align: center;
    }
    .feature img, .feature-text {
        width: 100%;
    }
}